Home Generator Help

Next on my list of preparedness is a home generator. I really am not sure where to start on my research?

What is going to be the best fuel to power my home generator? I'm looking to be able to safely store enough to get me through hairy times and/or have access to more when TSHF.

Are there any reputable companies out there that you would recommend for buying and installing a home generator?

A smaller question would be what sections of my house should I have wired to receive power from said generator?

Any and all help is much appreciated.

Thanks Turdites!